Sand-core-making machine



(No Model.) 2 Sheets-Sheet 1.

D. OARLIN. SAND GORE MAKING MACHINE. No. 482,790. Patented July 22,1890.

WITNESSES INVENTOR 2 t e e h A s t e nu h S 2 (No Model.)

D. GARLIN.

SAND 00m: MAKING MAOHINE.

No. 432,790. Patented July 22, 1890.

WITNESSES UNITED STATES PATENT OFFICE.

DAVID OARLIN, OF PITTSBURG, PENNSYLVANIA.

SAND-CORE-MAKING MACHINE.

SPECIFICATION forming part of Letters Patent No. 432,790, dated July22,1890.

Application filed February 6, 1890. Serial No. 339,379. (No model.)

To all whom it may concern.-

Be it known that I, DAVID CARLIN, of Pitts burg, in the county ofAllegheny and State of Pennsylvania, have invented certain new anduseful Improvements in Sand-Corehiaking Machines; andI do hereby declarethe following to be a full, clear, and exact description of theinvention, such as willenable others skilled in the art to which itappertains to make and use the same. 7

My invention relates to an improvement in sand-core-1naking machines.

The object is to provide a machine which can be operated by unskilledlabor to produce cores of high excellence, a machine which shall besimple and occupy very little ground area, and which shall doits workrapidly.

Vith these ends in view my invention consists in certain features ofconstruction and combinations of parts, as will be hereinafterdescribed, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a view of the machine in sideor end elevation. sand-feeding and core-arbor-wetting devices removed.Fig. 3 is a view in detail of the shaft and shifting-rod for operatingthe feed. Fig. 4; is a view in detail of the feed-plates, and Fig. 5 isa horizontal cross-section on line a; 00, Fig. 3; and Fig. 6 is asimilar section on line y y, same figure.

' A represents a supporting-frame, at the base of which a sand-receivingbox 13 is located.

At a suitable distance above the box B an elevator-supporting anddriving shaft C is journaled in suitable bearings secured to the frameA, and having fixed thereon a drivingpulley c and wheels 0', about whichthe elevator-chains D pass. The opposite end of the elevator is heldnear the bottom of the sandbox B by a shaft E, provided with wheels 6,about which the elevator-chains D pass, and as the elevator extendsupwardly from its lower end it is directed back from a vertical line bymeans of a pair of guide-pulleys F, mounted on arms of the 'frame A, insliding bearings f, engaged by adjusting-screws f. The object of soslanting the elevator is to carry it back out of the way of thecore-arbor, so that the waste sand may fall freely from the arbor intothe core-box in position to be picked up by the buckets cl of theelevator. In fact, the

Fig. 2 is a front View in elevation with point at the bottom of the boxB, where the buckets first begin to scoop up their load. The core-arborG may thus be located in or over the upper portion of the sand-receivingbox B directly over the lower portion of the elevator, and isconveniently supported in suitable bearings g, secured to the cross headII.

The cross-head H, carrying the strippingknife I, is secured to theuprights of the frame A by means of bearings h, which have a slidingadjustment toward and away from the feed-hopper in order to adjust thecoref arbor toward and away from the feed-hopper to allow the sand tofall a lesser or greater distance, according as the core is to besmaller or larger. One convenient means of obtaining the desiredadjustment of the knifecarrying cross-head is to provide the bearings hwith tongues or bolts h, adapted to slide in slots 71 in the frame A,and provide nuts or other well-known devices for locking the bearings inadjustment. A support K is provided at one end of the cross-head I-Ieither integral with the cross-head or fixed thereto,

the said support being provided with bearings 7.0 for the reception of acore-arbor-driving spindle L, j on rnaled therein and adapted to beadjusted together with the cross-head and support K toward and away fromthe hoppeigremaining at all times in alignment With the axes of thecores. On the end of the spindle toward the corearbor an arm Zisprovided, which has a sliding movement in the direction of the length ofthe spindle to engage the end of the core-arbor for the purpose ofrotating it. It is found convenient to provide the armZ with a pin Z,adapted to engage a pin or lug g on the core-arbor. The spindle is alsoprovided with a fixed and an idle pulley M M, whichcorrespond withpulleys m m on the lower elevator-shaft E, through which motion isimparted to the spindle by a suitable belt "m9.

A water-trough N is conveniently located in front of the box B near thecore-arbor bearings, in which the water is kept constantly at such alevel that the face only of the core-arbor may be wet before placing itin position to form the core. To keep the water at the. desired level, adrain-pipe N ,is provided, and has its inlet within the trough at apoint to carry off the water when it reaches a certain height, therebyretaining the water in the trough at a vcertain level.

The front of the sand-receiving box B slants gradually toward the lowerend of the elevator to direct the falling sand to the elevator-buckets,and the bottom of the said box slants upwardly, as shown at b, from apoint below the rear lower end of the elevator to a revolvingsand screenor riddle, through which the supply of sand is fed to the box and thesize of the grains determined in order to secure a more uniform finishof the core. The sand-feeding hopper O is secured to thesupporting-frame A above the position of the core-arbor and under theupper end of the elevator in position to receive the sand as theelevator-buckets empty themselves.

The continuous feeding of the sand to the core-arbor and the regulationof the amount of sand fed are features of the highestimportance informing'a perfect core. More par ticularly is it desirable that theamount of sand fed should gradually diminish as the core approachescompletion, and to this end, as well as to provide an uninterrupted flowof the sand free from lumps or cakes, the following mechanism isprovided: The bottom of the hopper immediately aboy e the delivcry-spouto is provided with a pair of feedplates P, each secured to a rock-shaftp. The rock-shafts p are each provided with an operating-arm p, and thefree ends of the arms 1) are connected by links 19 with vibrating leversQ, located in the present instance at the top of the hopper andfulcrumed at their A 0 rear ends in suitable bearings q. A shaft R isjournaled in bearings secured to the hopper or to a suitable support inpositionimmediately below the front ends of the vibrating levers Q, andhas fixed thereon a pulley r, driven from the elevator-shaft O. Thebearings r, in whi 'dahe shaft R is journaled, have a sliding movementtoward and away from the vibrating levers Q, and for this purpose theymay have a dovetail connection with their support, or any otherwell-known and approved plan may be adopted. I have shown, however, ablock W rigidly secured to the side of the hopper. This block isprovided with a dovetail groove 1 which takes the dovetail projection ofthe sliding bearing. A vertical slot r is also formed in this block andis also formed in the side of the hopper to allow of the verticalmovement of the shaft H. Although I have shownthis construction the sameis immaterial, for I contemplate as coming within the scope of myinvention any device or mechanism by means of which the shaft may bevertically adjusted. The shaft R is provided with triangular-shaped camsS, fixed thereon in position to engage the under faces of the free endsof the vibrating levers Q as the shaft revolves, and thereby, throughbor from the hopper.

the levers Q, links 10 and arms p, the. feedplates P are caused tooscillate, keeping the sand at the bottom of the hopper thoroughlyagitated and opening their lips to allow the sand to escape. It follows,therefore, that the greater the elevation of the vibrating levers Q thegreater will be the opening between the lips of the feed-plates and themore rapid the feed, and vice versa.

For the purpose of moving the shaft R, and hence the cams S toward andaway from the levers Q, a shifting-rod T, provided with anoperating-lever t, is provided and has fixed thereon short arms or lugs25, which are constructed to engage the sliding bearings r as the rod isrocked by the attendant operating the lever 25.

The operation of the parts having been specifically indicated inconnection with their description the operation of the whole may bebriefly stated. The core-arbor, having been placed in its bearings inthe water-trough and its surface wet, is placed in its bearings in themachine to receive the sand. The elevator being in motion, and hence thearbor-v driving spindle, the arm on the spindle is slid into engagementwith the arbor and the sand rllowed to fall upon the revolving ar- Asthe core reaches completion, the operator by means of the lever 16diminishes the flow of sand and stops it as the core completed. The sandwhich does not adhere to the core and that which is severed therefrom bythe knife falls directly to the bottom of the box, and together with theseveral parts described without departing from the spirit and scope ofmy invention. Hence I do not wish to limit myself strictly to theconstruction herein set forth 5 but,

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. In combination, a sand receiving receptacle, a sand-feeding hopper,core-arbor bear ings located beneath the feeding-hopper and over thesand-receiving receptacle, and an elevator extending from beneath thecore-an bor bearings upwardly and rearwardly and thence upwardly andforwardly to a point over the feed-hopper, and adjustable guidepulleyslocated intermediate the ends of the elevator for directing andregulating the tension of the elevator, substantially as set forth.

2. The combination, with the core-arbor and its bearings, of across-head carrying a knife and having an adjustment toward and awayfrom the feedhopper, a rotary spindle,

a spindle-support constructed to move with the cross-head, and means forcoupling the spindle to the core-arbor, substantially as set forth.

The combination, with the core-arbor and its bearings and a cross-headhaving an adjustment toward and away from the feedhopper, of aspindle-support fixed to move with the cross-head,a rotary spindlemounted in the support in alignment with theaxis of the core-arbor, anda sliding arm on the rotary spindle for coupling the spindle to thecore-arbor, substantially as set forth.

4. The combination, with the feed-hopper and a feed-plate pivotally secured to the bottom of the hopper in rocking adjustment to regulate theflow of sand tl'irough the bottom of said hopper, of an operating-armsecured to the plate,a rotatable cam, and a connection between the camand the operating-arm, whereby the rotation of the cam causes the plateto rock or oscillate, substantially as set forth.

5. The combination, with the feed-hopper and the feed-plate pivotallysecured to the bottom of the hopper in rocking adjustment to regulatethe flow of sand through the bottom of said hopper, of operating-armsconnected with,the plates, a rotatable shaft carrying cams, levers inengagement with the cams, and connections between the levers and theoperating-arms, whereby the rotation of the cams oscillates the plates,substantially as set forth.

6. The combination, with the feed-hopper and the rocking plates securedto the bottom of the hopper with their free edges toward each other, ofoperating-arms secured to the plates, rotatable cams mounted in movablebearings, levers engaged With the cams and connected With theoperating-arms, and means for moving the cams toward and away from thelevers, substantially as set forth.

7. The combination,with the feed-hopper and the rocking plates at thebottom of the hopper, of a rotary shaft carrying cams, slid; inghearings in which the shaft is mounted, a shifting-rod having arms orlugs in engagement with the sliding bearings, levers in engagement withthe cams, and connections between the levers and the rocking plates forregulating the feed, substantially as set forth.

8. The combination,with the sand-receivingbox, the elevator extendingfrom within the box, and the core-arbor bearings located over the box,of a watertrough supported conveniently near the core-arbor bearings andprovided with a seat for the core-arbor, and means for keeping the waterat a constant level to wet only the surface of the corearbor,substantially as set forth.

9. The eombination,with the sand-receiving box having anupwardly-inclined bottom and the elevator extending from within the boxat the lower terminus of the incline, of a sand-riddle at the end of theboxat the upper. portion of the incline, and core-arbor bearings overthe portion ofthe box at the lower terminus of the incline, whereby theelevator may be fedwith the waste sand falling from the core and withthe sand from. the riddle, substantially as set forth.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

DAVID OARLIN.

WVitnesses:

J. CHAS. DICKEN, W. G. DICKEN.

